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   <h1 class="title">日期与时间相关扩展</h1>
   







   








   






  <ul class="chunklist chunklist_set"><li><a href="book.calendar.html">Calendar</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.calendar.html">简介</a></li><li><a href="calendar.setup.html">安装/配置</a></li><li><a href="calendar.constants.html">预定义常量</a></li><li><a href="ref.calendar.html">日历 函数</a></li></ul></li><li><a href="book.datetime.html">日期/时间</a> — 日期和时间<ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.datetime.html">简介</a></li><li><a href="datetime.setup.html">安装/配置</a></li><li><a href="datetime.constants.html">预定义常量</a></li><li><a href="datetime.examples.html">范例</a></li><li><a href="class.datetime.html">DateTime</a> — DateTime 类</li><li><a href="class.datetimeimmutable.html">DateTimeImmutable</a> — The DateTimeImmutable class</li><li><a href="class.datetimeinterface.html">DateTimeInterface</a> — The DateTimeInterface interface</li><li><a href="class.datetimezone.html">DateTimeZone</a> — DateTimeZone 类</li><li><a href="class.dateinterval.html">DateInterval</a> — DateInterval 类</li><li><a href="class.dateperiod.html">DatePeriod</a> — DatePeriod 类</li><li><a href="ref.datetime.html">Date/Time 函数</a></li><li><a href="datetime.formats.html">Supported Date and Time Formats</a></li><li><a href="timezones.html">所支持的时区列表</a></li></ul></li><li><a href="book.hrtime.html">HRTime</a> — High resolution timing<ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.hrtime.html">简介</a></li><li><a href="hrtime.setup.html">安装/配置</a></li><li><a href="hrtime.examples.html">范例</a></li><li><a href="class.hrtime-performancecounter.html">HRTime\PerformanceCounter</a> — The HRTime\PerformanceCounter class</li><li><a href="class.hrtime-stopwatch.html">HRTime\StopWatch</a> — The HRTime\StopWatch class</li><li><a href="class.hrtime-unit.html">HRTime\Unit</a> — The HRTime\Unit class</li></ul></li></ul></div></div></div></body></html>